The VOD will be up in a couple of says on my YouTube page.
One thing I can suggest for controlling the AI is to try and make a number system. The higher the number is, the faster they typically go. That way, you can set the three computers to different numbers to represent how good they should be.
An idea of how this would work is this: the higher the number, the higher the top speed of that car if it's ahead of the player. This can then be randomly assigned to each car. They can get faster when you're ahead, but they slow down when you're behind. You could even make cap speeds for when they're ahead.